Fructose 1,6-bisphosphate aldolase from rabbit muscle

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.189 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


A conserved glutamate residue exhibits multifunctional catalytic roles in D-fructose-1,6-bisphosphate aldolases.

Maurady, A.Zdanov, A.De Moissac, D.Beaudry, D.Sygusch, J.

(2002) J Biol Chem 277: 9474-9483

  • DOI: https://doi.org/10.1074/jbc.M107600200
  • Primary Citation of Related Structures:  
    1EWD, 1EWE, 1EX5, 3B8D

  • PubMed Abstract: 

    The aldolase catalytic cycle consists of a number of proton transfers that interconvert covalent enzyme intermediates. Glu-187 is a conserved amino acid that is located in the mammalian fructose-1,6-bisphosphate aldolase active site. Its central location, within hydrogen bonding distance of three other conserved active site residues: Lys-146, Glu-189, and Schiff base-forming Lys-229, makes it an ideal candidate for mediating proton transfers. Point mutations, Glu-187--> Gln, Ala, which would inhibit proton transfers significantly, compromise activity. Trapping of enzymatic intermediates in Glu-187 mutants defines a proton transfer role for Glu-187 in substrate cleavage and Schiff base formation. Structural data show that loss of Glu-187 negative charge results in hydrogen bond formation between Lys-146 and Lys-229 consistent with a basic pK(a) for Lys-229 in native enzyme and supporting nucleophilic activation of Lys-229 by Glu-187 during Schiff base formation. The crystal structures also substantiate Glu-187 and Glu-189 as present in ionized form in native enzyme, compatible with their role of catalyzing proton exchange with solvent as indicated from solvent isotope effects. The proton exchange mechanism ensures Glu-187 basicity throughout the catalytic cycle requisite for mediating proton transfer and electrostatic stabilization of ketamine intermediates. Glutamate general base catalysis is a recurrent evolutionary feature of Schiff base0forming aldolases.

  • Organizational Affiliation

    Department of Biochemistry, University of Montreal, CP 6128, Station Centre Ville, Montréal, Québec H3C 3J7, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fructose-bisphosphate aldolase A
A, B, C, D
363Oryctolagus cuniculusMutation(s): 1 
Gene Names: ALDOA
Find proteins for P00883 (Oryctolagus cuniculus)
Explore P00883 
Go to UniProtKB:  P00883
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00883
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.189 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 164.32α = 90
b = 57.51β = 102.66
c = 85.36γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-GENdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-11-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description
  • Version 1.3: 2021-10-20
    Changes: Database references, Derived calculations
  • Version 1.4: 2024-02-21
    Changes: Data collection